Abaixo está uma instrução que descreve uma tarefa de geração de SQL, combinada com uma entrada que fornece mais contexto sobre os esquemas de tabela disponíveis. Escreva o código SQL que responda adequadamente à solicitação
 ###Instrução: quantas posições wallace, mike mike wallace jogou para
 ###Tabelas: CREATE TABLE state_schools (state_schools_id AUTO_INCREMENT PRIMARY KEY, School VARCHAR, Gender VARCHAR, Age Range VARCHAR, Religious Affiliation VARCHAR, Location VARCHAR, School website VARCHAR) CREATE TABLE comparison_chart (comparison_chart_id AUTO_INCREMENT PRIMARY KEY, Project VARCHAR, License VARCHAR, Date VARCHAR, Protocol VARCHAR, Technology VARCHAR, Server VARCHAR, Client VARCHAR, Web Client VARCHAR, Multiple Sessions VARCHAR, Encryption VARCHAR, Authentication VARCHAR, Data Compression VARCHAR, Image Quality VARCHAR, Color Quality VARCHAR, File Transfer VARCHAR, Clipboard Transfer VARCHAR, Chat VARCHAR, Relay VARCHAR, HTTP Tunnel VARCHAR, Proxy VARCHAR) CREATE TABLE 2009_nfl_draft (2009_nfl_draft_id AUTO_INCREMENT PRIMARY KEY, Round INT, Pick # INT, Player VARCHAR, Position VARCHAR, Height VARCHAR, Weight VARCHAR, College VARCHAR, Status VARCHAR) CREATE TABLE doubles:_11_8–3 (doubles:_11_8–3_id AUTO_INCREMENT PRIMARY KEY, Outcome VARCHAR, Date VARCHAR, Tournament VARCHAR, Surface VARCHAR, Partner VARCHAR, Opponents in the final VARCHAR, Score in the final VARCHAR) CREATE TABLE features_by_model (features_by_model_id AUTO_INCREMENT PRIMARY KEY, Model Name VARCHAR, Model # VARCHAR, Color VARCHAR, Switch Type VARCHAR, Interface VARCHAR, Blank Keytops VARCHAR, Introduced VARCHAR)  
SELECT COUNT Position FROM 2009_nfl_draft WHERE Player = Wallace, Mike Mike Wallace